Agroup of fitness club members lose a combined total of 28 kilograms in 1 week there are approximately 2.2 pounds in 1 kilogram assuming the weight loss happened at a constant rate about how many pounds did the group lose each day

8.8 pounds per day.

Step-by-step explanation:

We have been given that a group of fitness club members lose a combined total of 28 kilograms in 1 week there are approximately 2.2 pounds in 1 kilogram.

First of all, we will convert the weight loss into pounds by multiplying 28 by 2.2 as shown below:

Now, we will divide total weight loss by days in week to find weight loss per day.

Therefore, the the group lost 8.8 pounds per day.

for the points

step-by-step explanation:

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12